Damper regulator for boilers



June 4, 1929. H, H, WILSON 19716.20()

DAMPER REGULATOR Fon BoILERs Filed July 20, 1927 Patented June 4, 1929.

HURLEY H. WILSON, oF HARRISBURG, rnnivsvnvaurn, assrenon To FUEL savane,

INCORPORATED, or HARBISBURG, rnnnstvanra, A conronefron on runn- SYLVANIA.

DAMPER REGULATR FOR BOILERS.

Application filed July 2G,

This invention relates to a damper regulator for boilers, and more particularly to lthe improvement of the pressure responsive element of such a regulator as applied to a steam heating apparatus.

The object of the invention is the production of a pressure responsive element, Which Will readily operate at a predetermined pressure, and continue only upon successive increases of pressure, thereby producing a steady plunger movement as the pressure increases. This may be denominated a. dilerential or incremental movement.

Another object of the invention is the production or" a device ot this kind having a comparative long range of movement.`

Other objects and advantages of the invention will hereinafter appear and the novel features thereof Will be particularly pointed out in the appended claims.

Like letters ot' reference indicate like parts throughout the drawings, in which y Figure 1 is a sectional 'View With the regulator plunger at its lowest position, and

Figure 2 is a similar view showing the plunger in its raised position.

While the invention is described i'n connection with a damper regulator for a boiler of a steam heating plant, it Will be understood that thisuse is only indicative and that it may be just as useful in other places Where similar problems arise, as for instance, in an expansion joint in a pipe line, or other device Where a movement of one part ot a vessel containing pressure is desired ,with reference to a stationary part oit' the vessel, or in reducing pressure valves Where incremental or, differential movement with reference to pressure is desired.

The pressure responsive element may be described as consisting of a casing, a plunger, and guides for the plunger. lllhese parts Will noW be described in detail and their individual functions pointed out, after which a recital of theirconjoint use Will be given.

The casing 10 has a substantially cup shaped body to receive the plunger, and is provided With a depending nipple 11, by means of Which the casing may be attached to a boiler (not shown) or the like. The casing body is interiorly supplied With groovesy 12'to permit fluid pressure to be exerted upon the plunger to the top of the casing body.

Above the casing body is a collar 13 having 1927. Serial No. 207,296.

ber or other lleXiblc material made in the form of a truncated cone, the smaller end ot the diaphragm being clamped to the plunger as will be explained.

rlhe plunger 21 has the general form oi' a truncated cone With its outer Ytace 22 conforming to the inner face ot the casing body.

The plunger is provided .with a nipple 23- and with a clamping element 2li secured to the plunger by .means 01"' the screws 2.5. Between the conical iaces 26 and 27 ot' the lower end of the plunger and the clamping velement or nut, is secured the smaller end of the diaphragm.

Rising from the bottoinof the casing body is the hollow standard 28, in the lower end ot' which is provided one or more aperture 29 for the purpose of admitting fluid pressure within the casing body under the plunger 21. A sleeve 30 is mounted upon the standard, and is screwed into the nipple 23 o'j the plunger. At its upper end the sleeve 30 carries a coupling 3l. This coupling holds the plug 32 to the sleeve 30. The pivot eyelet 33 is formed as a part ot the plug 32, and the seres7 3d is a vent to allow the escape of air, so that the body el the device may be lilled with fluid forced in through the connection 11. In the Lipper end of the standard 28 is the perforated,A disk 35, through which the limit rod 36 passes, it being screwed into the plug 82 and provided with a head 87.

lt Will be appreciated that the standard 28 and the sleeve-30 act as'an eXtensible support for the plunger 21, which is thereby guided in its vertical movement. Referring to Figure 1 it Will be noted that the vWeight of the plunger When in its lovvermost position is sustained by the standard 28, by reason of the plug 32 resting upon the upper end ot the standard. Referring to Figure 2, it will be noted that the upper limit of movement ot' theplunger is determined by the bolt head 37 coming into contact vvith the disk 35.

From the foregoing description the individual functions of the several parts W`ll be apparent. A recital oi their conjoint use Will now be given. Fluid pressure admitted tirough the nipple 11 is exert-ed against the disk 35 and 'through the apertures 29 against the loWer face of the plunger 21 and diaphragm 20. Foi-.this purpose the plunger and the diaphragm may be considered as a piston operating' Within the casing. The grooves 12 permit the fluid pressure to be exerted upon the under tace of the diaphragm, and the effective pressure area of the piston Will be substantially that of a circle oi the collar 18 at the upper edge of the casing body, as indicated by the line A-A, on the drawing.

The parts are shown in Figure l as in active, when the diaphragm lies 'With its major portion against the outer 'face of the luneer and .sliohtl'7 aiva f from the inner e e l face of the casing body, in a position ready to respond to fluid pressure in the casing. As the luid pressure Within the casing increases, a point Will be reached When the plunger' Will rise. Due to the conical shape of the collar 13, the effective pressure area oi the piston Will decrease as the plunger rises, so that itV Will require compensating increases in the fluid pressure in the casing to' continue tl e upward movement of the plunger. The effective pressure area at any position oi the plunger will be that cross sectional area ot the collar at the height of the diaphragm bend at that point. lt Will be appreciated that in the upward movement of the plunger dueto the increases of luid pressureunder it, the diaphragm ilexes or rolls from the outer conical surface of the plunger to the inner conical surface of the collar, the diaphragm being turned inside out during this movement. in the position shown in Figure 2, the plunger Will have closed the dam-per or other element which it is designed to operate.

It is obvious that the movement o1 the plunger from its position shown in Figure 2 to that shown in Figure l Will take place steadily as the fluid pressure decreases in the casing, and the operation of the parts will lbe simply the reverse oi that occurring as the plunger rose.

It Will be appreciated that by the construction or' parts described, a large range o1 piston movement can be obtained, Which can be employed in the more effective operation of a damper or other element. decrease sures. For instance, `if one pound' fluid' pressure will start the piston in kits upward movement, it Will only move it a short distance or until the effectivepressurejarea of the piston is decreased; any iiurthermovenient of the piston can only secured through an increase in the luficl pressure' VWithin the casing. This variation in eective piston area is obtained by the diaphragm rolling back uponI .the inner conical surface of the collar, and cross sectional area off which becomes smaller as theV piston rises. y Thepr'o` duction of this incremental or differential ino-vement of the piston is ot advantage in the regulation of damper or the positioning a valve, such as a reducing valve or the like. Y

'fiaving described my invention, what I j ecting centrally upwardly from said body, a

piston coinlirilsi-ng. an outer face iared corresp onding to the flare of the body and mounted to move vertically upon said' standard?, a sleeve projecting upwardly from said piston and te'lescoiping in the movementof the piston upon said standard, a collar attached to the upper portion of said body .and inwardly flared, and a diaphragm, the body, collar and' diaphragm deiining a chamber ien communication With the boiler a-nd into which' the piston moves.

2. rllhe combination ot claim 1 wherein the flared inner Wall of the' body is .provided With ribs- Which are designed to space the ,piston from the body. With the diaphragm therebetween. A

3. The combination of claim 1 in which the' body and the piston sleeve are ,pro-vided with means for the attachment of links whereby the movement of the piston' may be translated into ka movem'entot an operating control.

lu testimony whereof I affix .my signature'.-

. HURLEY H. Witsen. 

